Choosing a retirement account is one of the highest-leverage financial decisions you'll make, because the tax treatment of your account can matter as much as the investments inside it. The US retirement system offers several distinct account types, each with its own contribution limits, tax rules, and eligibility requirements. This guide explains the main options in plain terms so you can match an account to your income, tax situation, and career stage.
The Two Tax Buckets: Traditional vs. Roth
Almost every retirement account in the US follows one of two tax models.
- Traditional (pre-tax): You contribute money before it is taxed, which lowers your taxable income today. Withdrawals in retirement are taxed as ordinary income. This structure favors people who expect to be in a lower tax bracket when they retire.
- Roth (after-tax): You contribute money you have already paid tax on. Qualified withdrawals, including all investment growth, are tax-free. This favors people early in their careers or in lower brackets now who expect higher taxes later.
Both models benefit from tax-deferred or tax-free compounding, which is why starting early matters more than fine-tuning account selection.
Workplace Plans: 401(k), 403(b), and 457(b)
Employer-sponsored plans are the most common entry point. A 401(k) is offered by for-profit employers; 403(b) plans serve nonprofits, schools, and certain religious organizations; and 457(b) plans are available to state and local government employees. For 2025, the employee contribution limit for 401(k), 403(b), and governmental 457(b) plans is $23,500, with an additional $7,500 catch-up for those 50 and older (and a larger catch-up for ages 60–63 under SECURE 2.0 rules).
The decisive advantage of a workplace plan is the employer match. A typical match might be 50% of contributions up to 6% of salary. Declining a match is effectively leaving part of your compensation on the table, so contribute at least enough to capture the full match before funding other accounts.
Many plans also offer a Roth 401(k) option, letting you make after-tax contributions within the same plan. Note that required minimum distributions (RMDs) now generally begin at age 73, and Roth 401(k) balances are no longer subject to lifetime RMDs.
Individual Retirement Accounts (IRAs)
IRAs are opened by you, not your employer, which gives you access to a much broader range of investments. For 2025, the IRA contribution limit is $7,000, plus a $1,000 catch-up at age 50 and older.
Traditional IRA
Contributions may be tax-deductible depending on your income and whether you (or your spouse) have a workplace plan. If you are covered by a plan at work, deductibility phases out at higher incomes. Growth is tax-deferred, and withdrawals are taxed as ordinary income.
Roth IRA
Contributions are never deductible, but qualified withdrawals are entirely tax-free. Eligibility phases out at higher incomes: for 2025, the ability to contribute fully phases out between $150,000 and $165,000 of modified adjusted gross income for single filers and between $236,000 and $246,000 for married couples filing jointly. A Roth IRA also offers flexibility, since you can withdraw your contributions (not earnings) at any time without tax or penalty.
Backdoor Roth strategy
High earners above the Roth income limits sometimes use a "backdoor" approach: making a nondeductible traditional IRA contribution and then converting it to a Roth. This is legal, but the pro-rata rule means any pre-tax IRA balances are factored into the taxable portion of the conversion. Consult a tax professional before proceeding.
Self-Employment and Small-Business Options
If you work for yourself or run a small business, you have access to plans with much higher contribution ceilings.
- SEP IRA: Simple to administer. For 2025, you can contribute up to 25% of compensation, capped at $70,000. Best for sole proprietors and businesses without employees.
- Solo 401(k): Allows both employee deferrals ($23,500 in 2025) and employer profit-sharing contributions, potentially reaching $70,000 total. Ideal for owner-only businesses.
- SIMPLE IRA: A lower-cost option for small businesses with employees, with 2025 deferral limits of $16,500 plus a $3,500 catch-up at 50 and older.
HSAs and Taxable Accounts as Retirement Tools
A Health Savings Account (HSA), available only with a qualifying high-deductible health plan, offers a rare triple tax advantage: deductible contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses. After age 65, non-medical withdrawals are taxed as ordinary income but avoid the 20% penalty, making an HSA a useful supplementary retirement vehicle.
A regular taxable brokerage account has no contribution limits and no withdrawal restrictions, though it offers no upfront tax break. It is the right home for retirement savings once tax-advantaged accounts are maxed out.
How to Prioritize Your Accounts
A widely used order of operations looks like this:
- Contribute enough to your 401(k) to earn the full employer match.
- Pay down high-interest debt, such as credit cards.
- Max out a Roth or traditional IRA, depending on your tax situation.
- Return to your 401(k) and increase contributions toward the annual limit.
- Fund an HSA if eligible, then a taxable brokerage account.
This sequence is a starting point, not a rule. If your plan charges high fees or has poor fund choices, prioritizing the IRA earlier can make sense.
What to Remember
Retirement accounts differ mainly in three ways: how contributions are taxed, how much you can put in, and when you can access the money. Capture any employer match first, choose between traditional and Roth based on your current versus expected future tax bracket, and use IRAs or self-employed plans to expand your savings capacity beyond workplace limits. Review your contribution amounts each year when the IRS publishes updated limits, and adjust as your income and career change.
